Printing plate lock-up



Nov. 28, 19 H. A. w. WOOD PRINTING PLATE LOCK-UP Original Filed May 20, 1930 2 Sheets-Sheet 1 WMV Nov. 28, 1933. H A, w WOOD 1,937,454

PRINTING PLATE LOCK-UP Original Filed May 20, 1950 2 Sheets-Sheet 2 Patented Nov. 28, 1933 to Wood Newspaper Machinery Corporation. New york, N. 1., a corporation of Yirginia Application May 20, 1930, Serial No. 1 Renewed July 9, 1932 10 Claims. (01.101-378) The principal object of this invention'is to provide a cylinder operated plate lock-up means usually operable by the turning of the cylinder but by which also the platecanbe lockedor unlocked manually and also to provide a simple construetion which may be applied to existing presses. I

Other objects and advantages of the invention will appear hereinafter. I I Reference is to be had to the accompanying drawings inwhich I a Fig. 1 is a plan of a printing press cylinder with the plates removed, showing a preferred embodiment of this invention;

Fig. 2 is anen'd view of the same; I I

Fig. 3 is a sectional View on the line 33 of Fig. 1 showing the means for operating the end plate clamp and showing the plate in position;

Fig. 4 is an end view. of the cylinder showing thelmanual means for unlocking the plate. and V Fig. 5 is a plan of the same. I V

The printing cylinder is provided with 1ongitudinal slots in certain of which are rigid blocks 11 near each end of the cylinder. This block'preferably is either integral with the cylin- In the end block 16 is a pivot pin; 20 .whichi'sconnected by a link 21 ,to a segmentarm 22 plV-' oted on a stud 23. This arm has a segment 24 40 on the opposite end; This segment meshes with teeth on one side of a segmental gear 25 fixed on a stud 26. The other side of this gear meshes with an intermediate gear 2'? on a stud 28 having a polygonal end 29 for receiving a wrench. The intermediate gear meshes with a segment 24 on a'second segment arm 22 exactly like the first named segment arm and connected with a link 21 f or operation by a seeond spring rod to force the second end clamp 15 against a plate.

The studs of the segment arms and gears are mounted with one end in the cylinder itself and the other end has a bearing in a bearing bracket 30 1which is attached to the cylinder. On the stud 26 is fixed an arm 31 having a roll 32 'carried'by a'stud thereon. The cylinder and'bea'ring bracket deer or fixed immovably in position. Through this I block extends a spring rod 12. A sprmglB on also carry a stud 33 which has a polygonal end 34 for receiving a wrench andalso carries a latch 35 adapted to hold the segmental gear 25 byco'rning into contact with a radial surface thereon but normallymovable on a concen'tric surface 36 on this segmental gear 25. A" spring 37 forces this latch against the gear'and into the position shown in Fig. 1 whenever the gear movesthat far.

In Figs. 4 and 5 isshown a hand -operated means for actuatingtheroller 32 to unlock the .65

plate. This consists ofra stucl 40 mounted on the frame of the machine and carryinga lever i1. One end of thislever is operated'by a spring 42 to normally force the lever back from the position shown in Fig. 4., When it is to operated the attendant presses 'down' the ,l andle, 43-. and

moves it. into the. position 'shownfin'Fig'. 4. f In this-position a shown, in Fig 5 a eam" 45501; the lever 41 is located in position forthe roll to engage it when the cylinderpomes around to the proper position, The object of this'isto move'the'roll as shown by the arrow in Fig. 11 tou'nlock the plates, the latch '35 resting at that timev on thesuriacel BSI Y When the roll is moved in that direction it, of course-turns the gears in such a direction asto so pull "out the two spring rods, thereby releasing the two end 'clamps' When itisdesired .to opj-' erate the press without the plate at the. end of the cylinder'and only the center plate'in place, the, I spring 13 pressesfthe collar l4flagains'tthecenter clip 16 thereby. placing the pressure directly on the center clip sothat the next platefwill beheld firmly in position. I In the unlocking or the plates thecollar 17 engages the center clip andv pulls it away from the next plate. f

, Operation a I It, will 1 be understood that [wh n 'putting fthe plates on the cylinderor takingfthem on .a man has to be stationed at each side of the eylin'de'r. for the purpose of putting theflplates inposition' or takingthem off. There is one of these operating devices at each side and the same. man can handle it. The operator presses thejog button with one hand while grasping the handle 43 in the other so, that the cylinder 'will rotate slowly. He pulls the handle down'so that the cam vengages I the roll when the cylinder,'rotating slowly, comes around to bring the rolllinto proper position.

The cam is so shaped that once the roll engages e the angularity of the cam that is sufiicient to'pre-" I vent its rising until the roll has rolledofi the cam.

In some cases it may be desirable'to operate this mechanism for locking up the plate manually without rotating the'cylinder to do it, especially, 11o

in case of emergency. For that purpose a hexagon end 29 is provided for the reception of a wrench; Here the intermediate gear 27 is turned slightly further than when operated in the usual manner so that the pawl will come down to the position shown. When it is desired to relock the plates after manual operation it is only necessary to place the wrench on the hexagonal end 34 and rotate it enough to disengage the latch;

The force of the springs 13 will then move the end clamps against the plate and turn the locking parts to their normally locked position. a

It will be understood ofcourse that ordinarily the plates are locked simply'by the rotation of the cylinder as .has been "the case heretofore. This invention is unique in that the plates can be locked manually without rotating the cylinder, as well as being unlocked manually.

It will be seen that the construction is comparatively simple and that the locking can be manipulated manuallyin either direction with or without a plate on the cylinder. Each end of the plate is held on by two clamps. In other words-there are four clamps to a set of plates andtwos'eparate operating mechanisms on each end of each'plate cylinder. "All these parts are carried'by' and rotate with the plate cylinder and are located beneath its surface. I

Although I have illustrated and described only one formbf the invention I am aware of the fact that'modifications, can be made therein by any personskilled in the. art without departing from thescope of the'invention as expressed in the claims. Therefore I do not wish to belimited in my this respect but what I do claim is: a printing'plate lockingd'evice, the combination with "a cylinder on which the platesare mounted, an end clamp for the plate and yielding means for forcing the end clampag'ainst the plate,

I; of mechanism carried by the cylinder for moving the end clamp away from'the plate in opposition to said yielding means, a cam adapted to be lobalti ed in position tobe engaged by said mechanism as the cylinder rotates to operate the mechanism, to withdraw 'the'endcIamp, andmeans for mani ually actuating said mechanism "when said cylinder isat rest to move, the end clamn toward 'or fr e la e. .9 11. 2. In a printing'plate locking deviceythe com bination with a cylinder'on which thep ates mounted, end clamps for the plate'and yielding means for forcingthe end clampsagainst plate to be. locked, of, a segmental gear an inter{ mediate gear meshing with thefseginental said intermediate gear havingits. end shaped t'o receive a wrench for hand operation, means operated by the gears for moving the end clamps away from the plates in opposition tosaidyield ing means, an oscillatablemember carried bythe.

gearing and a cam locatedfin' position'to be en' g aged by said member as the cylinder rotates to withdraw t the end, clamps, when. the cylinder'is a'trest.

plate; to be locked, of 'mechanism carried by the cylinder for movingfth'e end clamps, away. from the. plates in opposition to said yielding means,

,afcam, adapted to be located imposition to be.

en aged 'by' said, mechanisin 'as the cylinder r6- ta'tesf to operate the mechanism towithdraw the endlclamps, means for. manually actuating said mechanism when "thecylinder is atresttomOVe drawn by hand afterthe clamps have been operated by hand to restore them to positionto segment thereon, a segmental gear having two gear segments, one meshing with said arm, an

the end clamp toward or from the plate, said mechanism comprising a segmental gear cooperating with the rest of the mechanism to turn therewith or to be turned thereby and having a stop thereon, and a latch in position to engage said stop when the segmental gear is turned by hand to withdraw the end clamp, said latch hav ing connected therewith an end shaped to receive a wrench, whereby the latch can be withintermediate gear meshingwith the other gear and t er esm nalarmwcd an arm oscillatable'with the gear segment andha l: ing aroll thereon' v 5. ma 'plate lock-up, the combination oi a movable end clamp, a rod extending throughthe end clamp, a spring connected with the rod for normally moving the rod in to clamp a plate on the cylinder, a link connecte'dwith the rod, a segment' arm pivotally connected with the link and having. a gear segment thfi fon, a gear segment meshing therewith, an "arm movable with fthe said gear segment and a ,roll'on the'last'narned arm for operating the gearing to. release the end clamp. 1', i '6'; In a plate lock-up, the combination with a movable end'clamp and a spring ioi imoyi g it into position automatically to, lock the p e, of a rod connected'with thespringQan 01s latable arm mounted. on thecylinder and pitovided, with a roller and connected with tlie, rod for operating it, and a hand lever provided vgit h a cam adapted to be moved by the, leverinto. pp;- sition for engagement with the roller when}' 21, cylinder rotates past it for forcing, the roller in 1 .20

a direction to move the rod out to release. the

end, clamp.

on, of a spring rod. connected with 'said' end. 1.2 5

clamp for holding it in'position; for lockin plate, a link connected with said arm, a sag.-

, mental arm connected. with said 'link, having a,

ea e m t he eon a s m lfe a math: ing, with Said arm, an arm oscillatable with the gear'segment and having a roll thereon, a han d operated lever, pivoted on a stationary part of .the machine" and. provided witha ca nfad'apted to'be moved into a position tofengage. said 1'01 and cause it tomove tola position for unlo the end clamp, and. means forfnormallyhe g. said [cam outof the path of said 101111 l 3. In a plate lock-up, the combination, with. a movable end clamp and a spring. for moving it, into position automatically, to lock thel p ,ate,1aj1 c rod' connected with" the springv and passing. through to the endof the cylinder, an cs'cil-f latable arm provided with a rollv and'connelcted with the rod for operating it, the armjbeing,

mounted on thecylinder, a hand lever provided 1-1-5 with a cam' adapted to be moved by thelevier. into position for engagement with therolLwh' n the cylinder rotatespast it for forcing "the. rollina direction tomovethe rod sumo releasethe ma a e 9 enlw c l rm. fi ed; .5?

stop on the stud, a spring pressed latch adapted to engage the stop when the arm is moved to a complete unlocking position and hold it there and means whereby the latch can be turned back by hand to release the arm.

9. In a plate lock-up, the combination with a cylinder and an end clamp for a plate thereon, of an operating roll connected with the end clamp for unlocking it, a hand operated lever pivotedon a stationary part of the machine and provided with a cam adapted to be moved into a position to engage saidroll and cause it to and means for normally holding said cam out of the path of saidroll; I 10. In a printing plate locking device, thecombination of a printing cylinder, yielding means move to a position for "unlocking the end clamp,

for holding a plate on the cylinder, and means controlled by the rotation of the cylinder to operate said locking means to unlock the platev against the resistance of said yielding means,

of means for manually operating said yielding 

